GIMP (GNU Image Manipulation Program) is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, resizing, cropping, photo-montages, converting between different image formats, and more specialized tasks. GIMP is released under GPLv3+ licenses and is available for Linux, OS X, and Windows.
Wilber is the official GIMP mascot. Wilber was created at some time before 25 September 1997 by Tuomas Kuosmanen (Tigert) and has since received additional accessories and a construction kit to ease the process. Is a cross-platform image editor available for GNU/Linux, macOS, Windows and more operating systems. It is free software, you can change its source code and distribute your changes.Whether you are a graphic designer, photographer, illustrator, or scientist, GIMP provides you with sophisticated tools to get your job done. You can further enhance your productivity with GIMP thanks to many customization options and 3rd party plugins.
Since 2010, there has been a close collaboration between FSF/GNU and FreeWear, that donate a portion of the sales of GIMP materials in this website. This GIMP donations go to GNU.
More information: http://www.gimp.org/